Improvement in capstans



N Clitiill ginie-a.

JOHNnnlossou,` or NEW Youn, N4. Y,

Leners Patent No. 98,940, daad January 1s, 1870.

IMPROVEMENT IN CAPSTANS.

The Schedule referred to in these Letters Patent and making partfthelsame.

To all whomfit may concern.- e Y Be it known th'at I, J onu ERICSSON, ot' N ew York city, in the county and State of New York, have invented a new and improved Gapstan and I do hereby declare that the following is a full, clear, and exact description thereof', which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This invention has for its object to improve the construction of ships capsta-ns, so as vto simplify the mechanism, increase the safety, reduce the expense, and facilitate the repair of the entire apparatus.

The invention consists chieiiy in a novel manner of hanging the chain-barrels, and of connecting them with the oapstan proper, so that they can be readily and safely disconnected for dropping the anchor, fand .in the employment of eccentric shafts Yfor holding them out of gear. `The barrels are fitted loose around vertically-adjustable shaft-s, upon which gear-wheels are mounted. These gear-wheels connect with the barrels by clutches, and thereby `revolve them. When one shaft` is elevated with its gear-wheel, the chainbarrel -will Vbe entirely out of gear, and will allow the ,anchor to drop.

.The inventionconsists, also, in the application of a brake,` which can be applied to the chain-barrel while the anchoris being dropped, and which, as it is made of wood, can `be readily replacedwhen worn.

v.l he inventionV consists, also, iu the use of certain chain-Stoppers, which can be applied to lock the chain provisionally, whenever desired; also in the use o f chain-guides, which prevent the chain from becoming entangled.

Finally, the invention consists in the general con- Figure 2 is a vertical longitudinal section of the same, taken on the plane ofthe line y y, g. 1.

Figure 3 is a vertical transverse section of the same, taken on the plane of the line z z, tig. 1.

Figure 4 is a detail end view of an eccentric elevating shaft. l

Similar letters of reference indicate corresponding parts. y

A, in the drawing, represents the capstan proper, fit-ted upon a vertical shaft B, which has its: bearings in the flame or case O. 4

The frame is madeof two horizontal plates or parts, a and b, which are locked together by means of strong bolts, c c, and held apart by vertical ears or anges, (l, as shown.

The shaft B fits with its lower end into a step, e, which is arrangedin the lower plate b.

In the plate a is a box, f, by which the shaft B is also guided and steadied.

Between the step eand the box f is mounted upon the shaft B, a pinionD, which is rotated whenever the capstan is revo1ved. l

Pawls g g are pivoted to the capstan, and work in a circular rack, 71 ofthe frame in the usual manner.

Equidistaut from the shaft B are`iitted into the frame, two vertical shafts, E E, which are supported in steps, "i, of the plate b, and guided at their upper ends in the plate a.

Upon the upper part of each shaft, E, is securely mounted a toothed wheel, F, meshing into the pine ion D. v

Around the lower part V,of each shaft E is loosely fitted a chain-barrel, G, which has a grooved and toothed edge, to receive and carry the links of the chain, as shown.

The barrel G rests upon the plate b.

The shaft E is vertically adjustable.

When lowered, the wheel F- rests upon the barrel G, and is locked to the same by a clutch, j, formed on the two.

The wheel F, meshing into the pinion D, is rotated whenever the capstan is revolved, and it also rotates the chain-barrel, when lowered upon it to be connected with the same, as in tig. 2.

When, however, the shaft E is elevated, withthe wheel F as seen in fig. 3, the latter will be disengaged from the chain-barrel, and will leave the same entirely disconnected, and free to revolve. The shaft E can be elevated by means of an eccentric or ea-m Z, formed at the end of a horizontal arbor,

up with it, and will thereby draw the shaft and toothed When raised, the shaft -E is suspended .from the rounded face of the eccentric, and will not be able by itsweight to carry the chain down, and throw the chain-barrel into gear again.

By means of cranks n n, the arbors H are turned.

It is evident that one arbor H, and eccentric,`ar provided for each one of the shafts E. Y

The chains enter the apparatus between the drums G, pass respectively around the two drums and pass out at the ends ofthe frame, as indicated in fig. 1.

A stationary-chain-guide, J, is provided for each drum G, to prevent the chain fron becoming entangled and to separate the entering and discharged ends of thc same'. The chain-guide is in form of a plate,

fastened to the frame, and carried with its concave edge close to the edge of the drum, or into the groove of Vthe same.

I is a concave brake, made of wood,'witl1 a concave inner face that can be forced against the barrel .to more or less retard the motion of the'sarne.

Each brake is fitted upon the eccentric portion of a vertical shaft, L, by the turning o f which it canbe set.

The two chains, where they enter the apparatus, are separated i'om each other by a strong bolt, o, which is set up between the plates a b, as shown.

Each chain can be locked against that block o, by a chain-stopper, 19, which is an arm projecting from a vertical shaft,-M.

When the arm is swung parallel with-the course of the chain, it willfnot interfere with the action of the same, but when swung at right angles thereto, it will arrest it entirely.

The shaft B, held in the manner shown, is very steady, and the pinion D will always act reliable.

The drums G, when separated from the spur-wheels F, will be entirely free from all connection with the other machinery.

Having thus described my invention,

I claim as new, and desire to secure by Letters latentl. The shafts `E E, carrying the spur-wheels F, and arranged in a capstan-i'ranle, so that their vertical adjustment will lock or disengage the chain-barrel, as specified.

2. The chain-barrels G G, tted loose around the vertically-adjustable shafts E, to be clutched to such shafts,` when the same are lowered, and liberated whenl they are elevated, as set forth. Q

3'. The eccentric arbor H, arranged on a capstan, in combination with the vertically-adj ustable shaft E, .for the purposeof locking and liberating the chain-p barrel, as set forth.

4. The chain-Stoppers p, arranged in combination with the block o, on the shaft M, substantially asA herein shown and described.

5. The brake I, arranged on the eccentric shaft L, in combination with the loose chain-barrel G, to operate as set forth.

6. The arrangement of the capstan-shaft B, so as to rotate but not slide in its bearings, as shown and described.

J. ERICSSON.

Witnesses:

WM. FJ 'MGNAMARA, ALEX. F. ROBERTS. 

